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Commitments and Contingencies - Capital lease payments (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 1,137
2020 476
2021 165
2022 94
2023 10
Thereafter 0
Total minimum capital lease payments 1,882
Less: amounts representing interest (181)
Present value of net minimum capital lease payments 1,701
Less: current portion 1,000
Long-term portion $ 700